Boiling Water

Science
Science brain teasers require understanding of the physical or biological world and the laws that govern it.

A clever scientist in his lab can bring pure water to a vigorous boil, then immediately pour the water over his head without scalding himself. How does he do it?

Note: He does not cool the water down and he has no protective clothing whatsoever.

Hint

There are two ways to boil water. One is to heat it to 212 degrees Fahrenheit. What is the other?

Answer

He can apply a vacuum to a container of water. The water will boil but will remain at room temperature. He can then quickly relieve the vacuum and pour the water over his head without worry of scalding himself.